Low-voltage mold for manufacturing ultra-large new energy battery pack

Abstract

The low-voltage die for manufacturing the ultra-large new energy battery pack comprises a lower die set, an upper die set and a side die set, the upper die set and the lower die set are arranged on the upper portion and the lower portion of the side die set correspondingly, and concave faces corresponding to the protruding ends of the upper die set and the lower die set are arranged at the upper end and the lower end of the side die set correspondingly; the upper die set comprises an upper die main body piece, a top plate pressing plate, an upper top plate and a lower bottom insert, the three-section type design of the side die set and the open groove arrangement between the die set side plates and the end supporting plates not only adapt to the complex curved surface modeling of the battery pack, but also improve the operation flexibility and the opening and closing smoothness of the die, and the die set has the advantages of being simple in structure and convenient to use. Compared with the prior art, the mold maintenance and cleaning time is shortened, the production cycle is shortened, the production efficiency is improved, through the hollowed-out baffle and the guide assembly in the upper mold set and the precise design of the lower mold set, the size precision and the surface quality of a formed part are improved, precise matching of all parts of a battery pack is ensured, and the integrity and the sealing performance of the whole structure are enhanced.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and specifically to a low-pressure mold for manufacturing ultra-large new energy battery packs. Background Art

[0002] With the booming development of the new energy vehicle industry, the production of ultra-large battery packs faces unprecedented challenges, especially in the production process using low-pressure casting technology, where the technical difficulty has increased significantly. Among them, temperature control and precise management of mold size have become key bottlenecks restricting production efficiency and product quality. Specifically, the production environment temperature needs to be maintained above 400°C, which not only increases the complexity of mold thermal management in actual operation, but also makes the thermal expansion and contraction effect more obvious for molds with huge body sizes, which can easily cause mold deformation, thus seriously affecting the molding accuracy.

[0003] In addition, the battery pack shell wall thickness is usually designed to be around 5mm, in order to ensure the strength, weight and thermal management requirements of the battery pack. However, under existing technical conditions, mold deformation directly threatens this design requirement. Once the mold is deformed, the wall thickness of the casting will be uneven, even less than 3.5mm, which will not only affect the structural strength and sealing of the battery pack, but may also cause the casting to be directly scrapped, resulting in a huge waste of resources and seriously hindering production efficiency and cost control. Summary of the invention

[0004] The technical problem to be solved by the present application is to overcome the existing defects and provide a low-pressure mold for manufacturing ultra-large new energy battery packs, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a low-pressure mold for making ultra-large new energy battery packs, comprising a lower mold group, an upper mold group and a side mold group, wherein the upper mold group and the lower mold group are respectively arranged at the upper and lower parts of the side mold group, and the upper and lower ends of the side mold group are both provided with concave surfaces corresponding to the protruding ends of the upper mold group and the lower mold group, the upper mold group comprises an upper mold body, a top plate pressure plate, an upper top plate and a lower bottom insert, the interior of the upper mold body is a cavity, and the hollow baffle plate therein divides the internal cavity of the upper mold body into two, the lower bottom insert is embedded in the lower end cavity of the upper mold body, and the upper top plate is located at the upper end The upper top plate is provided with a top plate pressure plate, the upper top plate corresponds to the elastic component and the guide component provided on the hollow baffle plate, the side mold group includes a mold side plate and an end support plate, the mold side plates are located at the front and rear sides of the end support plate, and the two are closely arranged, the mold side plates adopt a three-section type, the two ends of the middle section of the mold side plate are concave arc surfaces, which are connected to the convex arc surfaces of the two side sections of the mold side plates, the lower mold group includes a lower mold body, a lower mold cylinder and a guide group, the lower surface of the lower mold body is surrounded by a lower mold cylinder, and the guide group is located in the through hole on the lower mold body.

[0006] As a preferred technical solution of the present application, a slot is provided between the side plate of the side mold assembly and the end support plate, and the slot is provided corresponding to the lower mold cylinder.

[0007] As a preferred technical solution of the present application, hooks are arranged on the lower ends of the four sides of the lower template body.

[0008] As a preferred technical solution of the present application, guide shafts are provided at the four corners of the upper mold assembly.

[0009] As a preferred technical solution of the present application, a limiting pad is provided at the upper end of the lower mold cylinder, and the slide groove on the limiting pad corresponds to the limiting plates provided around the upper mold assembly.

[0010] Compared with the prior art: the three-section design of the side mold group of the present application and the slot setting between the side plate of the module and the end support plate not only adapt to the complex curved surface shape of the battery pack, but also improve the operational flexibility and smoothness of the opening and closing of the mold, reduce the mold maintenance and cleaning time, speed up the production cycle, and improve production efficiency. Through the hollow baffle and guide assembly in the upper mold group, and the precise design of the lower mold group, combined with the uniform pressure of the upper mold pressing plate, the material is ensured to be evenly distributed inside the mold, which improves the dimensional accuracy and surface quality of the molded parts, ensures the precise matching of the various parts of the battery pack, and enhances the integrity and sealing of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of this application;

[0012] Figure 2 Schematic diagram of the upper module structure;

[0013] Figure 3 It is a schematic diagram of the lower module structure;

[0014] Figure 4 It is a schematic diagram of the side module structure.

[0015] In the figure: 1. upper mold assembly, 11. upper mold body, 12. top plate pressure plate, 13. upper top plate, 14. lower bottom insert, 2. side mold assembly, 21 mold side plate, 22 end support plate, 3. lower mold assembly, 31. lower mold body, 32. lower mold cylinder, 33. guide group, 4. elastic component, 5. guide component, 6. hook, 7. guide shaft, 8. limit pad. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application (for the convenience of description and understanding, the following is Figure 2 All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] See also Figure 1-4 The present application provides a technical solution: a low-pressure mold for making an ultra-large new energy battery pack, comprising a lower mold group 3, an upper mold group 1 and a side mold group 2, wherein the upper mold group 1 and the lower mold group 3 are respectively arranged above and below the side mold group 2, and the upper and lower ends of the side mold group 2 are both provided with concave surfaces corresponding to the convex ends of the upper mold group 1 and the lower mold group 3.

[0018] The upper module 1 is responsible for forming the top structure of the battery pack, while the lower module 3 is responsible for the bottom structure. The two together form a complete outer shell of the battery pack through precise docking with the side module 2.

[0019] The concave surfaces at the upper and lower ends of the side mold group 2 receive the protruding ends of the upper mold group 1 and the lower mold group 3, thereby achieving precise alignment and sealing when the mold is closed; this helps to maintain a stable pressure environment in the molding area, prevent material leakage, and ensure that the dimensions of each part of the battery pack are accurately matched, thereby improving the integrity of the overall structure.

[0020] The upper mold assembly 1 includes an upper mold body 11, a top plate pressure plate 12, an upper top plate 13 and a lower bottom insert 14. The interior of the upper mold body 11 is a cavity, and the hollow baffle therein divides the internal cavity of the upper mold body 11 into two. The lower bottom insert 14 is embedded in the lower end cavity of the upper mold body 11. The upper top plate 13 is located in the cavity at the upper end, and a top plate pressure plate 12 is arranged above the upper top plate 13. The upper top plate 13 corresponds to the elastic component 4 and the guide component 5 arranged on the hollow baffle.

[0021] The cavity inside the upper mold body 11 provides space for forming the upper shell of the battery pack. The hollow baffle provides support for the internal structure, and the cavity at the bottom leaves space for the battery unit to form the rest of the shell.

[0022] The top plate pressure plate 12 is located above the upper top plate 13 and ensures the uniform distribution and density of the material during the molding process by applying downward pressure, thereby improving the consistency and strength of the product.

[0023] The lower bottom insert 14 is pre-installed on the lower end of the upper mold body 11 to form a cavity formed by the workpiece.

[0024] The guide assembly 5 has a positioning or guiding function, and cooperates with the corresponding structure on the upper top plate 13 to ensure the precise closing and positioning of the mold, ensure the smooth movement of the mold during closing and opening, reduce wear and tear, and increase the life of the mold.

[0025] The side mold group 2 includes a mold side panel 21 and an end support plate 22. The mold side panel 21 is located at the front and rear sides of the end support plate 22, and the two are closely arranged. The mold side panel 21 adopts a three-section type. The two ends of the middle section of the mold side panel 21 are concave arc surfaces, which are connected to the convex arc surfaces of the two side sections of the mold side panel 21.

[0026] The three-section design of the module side panel 21 takes into account the complex geometric shape of the battery pack side. The segmentation can better fit the curved contour of the battery pack, ensuring that the molded battery pack has good sealing and appearance quality.

[0027] The concave arc surfaces at both ends of the middle section are connected to the convex arc surfaces on both side sections, which not only enables the mold to adapt to the curvature changes of the battery pack side, but also increases the structural strength of the mold, ensuring that the pressure is evenly distributed in the closed state, avoiding deformation or damage caused by local stress concentration.

[0028] The end support plate 22 provides lateral stability and support force, and enhances the rigidity of the entire mold. Especially when the mold is subjected to high pressure molding, it can effectively prevent lateral deformation of the mold and ensure the stability and accuracy of molding.

[0029] The lower die set 3 includes a lower die body 31 , a lower die cylinder 32 and a guide group 33 . The lower die cylinder 32 is arranged around the lower surface of the lower die body 31 , and the guide group 33 is located in a through hole on the lower die body 31 .

[0030] The lower template body 31 provides a molding space for the bottom structure of the battery pack; the lower mold cylinder 32 installation positions arranged around it enable the lower template body 31 to withstand and transmit the vertical pressure from the lower mold cylinder 32, ensuring that the molding material is fully compacted inside the mold.

[0031] The lower mold cylinder 32 is responsible for the opening and closing of the mold. It is driven by hydraulic or pneumatic pressure to provide the necessary pressure downward to close the mold and ensure that the material can be evenly distributed in the mold cavity during the molding process. At the same time, after the molding is completed, the retraction action of the lower mold cylinder 32 helps the mold to open, making it easier to take out the finished product.

[0032] The guide group 33 is located in the through hole on the lower mold plate body 31 and is used for material flow control. It is a guide channel for material flow and ensures that the material evenly fills the mold cavity.

[0033] Furthermore, a slot is provided between the die side plate 21 and the end support plate 22 in the side die set 2 , and the slot is provided corresponding to the lower die cylinder 32 .

[0034] The slots are provided to allow the mold side plates 21 and the end support plates 22 to move flexibly when the lower mold cylinder 32 drives the mold to open and close, avoiding interference with each other. This ensures that the lower mold cylinder 32 can be extended and retracted smoothly without being restricted by the obstruction of the mold side plates, improves the fluency of mold operation, helps maintain the precise alignment of the mold as a whole, and ensures the dimensional accuracy during molding and the consistency of the product.

[0035] Furthermore, hooks 6 are provided at the lower ends of the four sides of the lower template body 31 .

[0036] Furthermore, guide shafts 7 are provided at the four corners of the upper mold assembly 1 .

[0037] The guide shaft 7 provides precise guiding function during the mold closing process, and serves as the reference for the alignment of the upper mold assembly 1 and the lower mold assembly 3, ensuring that the position is accurate each time the mold is closed.

[0038] By designing the guide shafts 7 evenly distributed at the four corners, the pressure when the mold is closed can be evenly distributed, preventing deformation or damage caused by excessive local force, protecting the integrity of the mold structure and extending its service life.

[0039] Furthermore, a limiting pad 8 is provided at the upper end of the lower die cylinder 32 , and the slide groove on the limiting pad 8 corresponds to the limiting plates 5 provided around the upper die assembly 1 .

[0040] The limiting pad 8 is precisely connected with the limiting plates around the upper mold assembly 1 through the sliding groove, which improves the assembly efficiency and provides convenience for installation.

[0041] When in use: the upper die set 1 and the lower die set 3 are locked to the upper bottom plate and the lower bottom plate of the external device respectively, and the external device drives the upper die set 1 and the lower die set 3 to move up and down, and the die set side plate 21 and the end support plate 22 of the side die set 2 are connected to the external oil cylinder, and the oil cylinder drives the die set side plate 21 and the end support plate 22 to close the mold in four directions, front, back, left, and right. After the side drawing and closing the mold is in place, the sand core is put in, and then the upper die set 1 is dropped to close the mold, and the aluminum liquid in the furnace is pressed into the mold cavity through the guide group 33 by the equipment insulation furnace to form a casting, and then the pressure is maintained. After cooling, the lower die cylinder 32 rises and pushes the upper die set 1 up, and the casting is lifted up with the upper die. After rising to a certain height, the equipment receiving tray enters the intermediate gap between the upper and lower dies, and the oil cylinder of the side die set 2 is started to complete the mold opening in four directions, front, back, left, and right, and the upper ejector plate 12 ejects the casting and falls on the external receiving tray.

[0042] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A low-pressure mold for manufacturing an ultra-large new energy battery pack, comprising a lower mold group (3), an upper mold group (1) and a side mold group (2), wherein the upper mold group (1) and the lower mold group (3) are respectively arranged above and below the side mold group (2), characterized in that: The upper and lower ends of the side mold group (2) are both provided with concave surfaces corresponding to the protruding ends of the upper mold group (1) and the lower mold group (3); the upper mold group (1) comprises an upper mold body (11), a top plate pressure plate (12), an upper top plate (13) and a lower bottom insert (14); the interior of the upper mold body (11) is a cavity, and the hollow baffle plate therein divides the internal cavity of the upper mold body (11) into two; the lower bottom insert (14) is embedded in the lower end cavity of the upper mold body (11); the upper top plate (13) is located in the upper end cavity, and a top plate pressure plate (12) is provided above the upper top plate (13); the upper top plate (13) is connected to the elastic component (4) and the hollow baffle plate Corresponding to the guide assembly (5), the side mold assembly (2) comprises a mold side plate (21) and an end support plate (22), the mold side plate (21) is located at the front and rear sides of the end support plate (22), and the two are arranged closely, the mold side plate (21) adopts a three-section type, the two ends of the middle section of the mold side plate (21) are concave arc surfaces, which are connected to the convex arc surfaces of the two side sections of the mold side plate (21), the lower mold assembly (3) comprises a lower mold body (31), a lower mold cylinder (32) and a guide group (33), the lower surface of the lower mold body (31) is provided with a lower mold cylinder (32), and the guide group (33) is located in a through hole on the lower mold body (31).

2. According to claim 1, a low-pressure mold for making an ultra-large new energy battery pack is characterized in that: A slot is provided between the die set side plate (21) and the end support plate (22) in the side die set (2), and the slot is provided corresponding to the lower die cylinder (32).

3. According to claim 1, a low-pressure mold for making an ultra-large new energy battery pack is characterized in that: Hanging hooks (6) are arranged at the lower ends of the four sides of the lower template body (31).

4. According to claim 1, a low-pressure mold for making an ultra-large new energy battery pack is characterized in that: Guide shafts (7) are provided at the four corners of the upper die assembly (1).

5. According to claim 1, a low-pressure mold for making an ultra-large new energy battery pack is characterized in that: A limiting pad (8) is provided at the upper end of the lower die cylinder (32), and the slide groove on the limiting pad (8) corresponds to the limiting plates provided around the upper die assembly (1).

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